Writing instrument



FIG. 1 is a front perspective view of a writing instrument showing mynew design, with the lower section of the barrel in a retracted positionand the cap member in place;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a right side elevational view;

FIG. 5 is a left side elevational view;

FIG. 6 is a top plan view;

FIG. 7 is a bottom plan view; and

FIG. 8 is a front perspective view in an exploded condition with thelower section of the writing instrument barrel in an extended condition.

The ornamental design for a writing instrument, as shown and described. 